Many thanks to David Livesay for the hard work done in creating this list of free flight model plans and articles that appeared in American Aircraft Modeler, and for giving permission to duplicate it. I included additional listings from Air Trails and American Modeler. Here is the AMA Plans Service for ordering full-size copies.
Note: If I happen to have the edition in which your plan of interest was printed, I will be glad to scan the article for you - as time permits. Also, I sometimes forget to link to articles, so if the one you are interested in is not hyperlinked, please use the Search box to look for it.